/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hadoop.hive.ql.optimizer.calcite;

import org.apache.calcite.plan.Context;
import org.apache.hadoop.hive.ql.optimizer.calcite.cost.HiveAlgorithmsConf;
import org.apache.hadoop.hive.ql.optimizer.calcite.rules.HiveRulesRegistry;


public class HivePlannerContext implements Context {
  private HiveAlgorithmsConf config;
  private HiveRulesRegistry registry;

  public HivePlannerContext(HiveAlgorithmsConf config, HiveRulesRegistry registry) {
    this.config = config;
    this.registry = registry;
  }

  public <T> T unwrap(Class<T> clazz) {
    if (clazz.isInstance(config)) {
      return clazz.cast(config);
    }
    if (clazz.isInstance(registry)) {
      return clazz.cast(registry);
    }
    return null;
  }
}